CN110295320B - Large-wall-thickness X52MS acid-resistant pipeline steel plate produced by LF-RH refining process and manufacturing method thereof - Google Patents
Large-wall-thickness X52MS acid-resistant pipeline steel plate produced by LF-RH refining process and manufacturing method thereof Download PDFInfo
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
Abstract
The invention relates to a large-wall-thickness X52MS acid-resistant pipeline steel plate produced by an LF-RH refining process, which is characterized in that: the steel plate comprises the chemical components of 0.03-0.07 wt% of C and 0.2-0.4 wt% of Si; mn 1.0-1.4; 0.02-0.04 of Al; nb 0.02-0.05; v is less than or equal to 0.02; ti 0.004-0.012; 0.1-0.4 of Cr; mo 0.1-0.2; b is less than or equal to 0.0005; p is less than or equal to 0.012; s is less than or equal to 0.001; [ N ] is less than or equal to 0.005; [ O ] is less than or equal to 0.005; [H] less than or equal to 0.0015; the cold crack sensitivity coefficient Pcm is less than or equal to 0.19, and the balance is Fe and inevitable impurities. The manufacturing method comprises the working procedures of KR molten iron pretreatment, converter smelting, LF and RH refining, slab continuous casting, slab heating, rough rolling, intermediate billet cooling, finish rolling, ACC cooling and the like which are sequentially carried out. The thickness of the steel plate manufactured by the invention is 35.1-44.2mm, the yield strength is 380-440MPa, the tensile strength is 490-570MPa, the elongation is more than or equal to 33 percent, and the yield ratio is less than or equal to 0.90; the average shear surface ratio of the drop weight at minus 5 ℃ is more than or equal to 85 percent. Can meet the requirement of steel for large-wall-thickness X52MS pipelines used in an acid environment, and has good HIC (hydrogen induced cracking) resistance and low-temperature toughness.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and relates to a large-wall-thickness X52MS acid-resistant pipeline steel plate produced by an LF-RH refining process and a manufacturing method thereof.
Background
The long-distance pipeline is used as a main conveying mode of oil and gas resources and is widely applied to onshore and seabed energy projects. In order to meet the requirements of high gas transmission and safety, pipeline steel resisting wet hydrogen sulfide corrosion is generally adopted for a conveying medium containing hydrogen sulfide corrosion gas. With the shift of drilling areas to desert, deep sea and other areas with harsh environment, the demand of acid-resistant pipelines with large wall thickness is more and more outstanding, and the safety of products directly determines the design and implementation of the whole project. However, the pipeline steel belongs to acid-resistant pipeline steel with large thickness, and the requirement on the manufacturing process is higher when the thickness is larger, so that a plurality of technical difficulties exist. Firstly, in order to ensure a large compression ratio, a high-homogeneity continuous casting slab with large thickness is required, and for the continuous casting slab, the larger the thickness is, the larger the segregation is, the more the defects are, the contradiction between the two is caused, and the difficulty is extremely high. Secondly, in order to ensure the production of the large-thickness high-homogeneity continuous casting billet, molten steel with ultra-pure narrow components needs to be provided, the less inclusions are, the better inclusions are, and the requirements on the purity and stability of the molten steel exceed that of any kind of steel plate at present. Thirdly, when the maximum target thickness related to the steel is 44.2mm, when the thickness exceeds 30mm, the deformation difference of the surface and the center of the thickness in the rolling process is huge, and the temperature gradient and the cooling speed difference in the cooling process are huge, so that the tissue uniformity control difficulty is large, and particularly, the steel contains the corrosion-resistant pipeline steel with large thickness required by drop weight, and the tissue regulation difficulty is large. At present, the production of the large-thickness wet hydrogen sulfide corrosion resistant pipeline steel is mainly concentrated on Germany, Korea and Japan, the domestic pipeline steel has the maximum application thickness of 33mm, and a large-wall-thickness wet hydrogen sulfide corrosion resistant steel plate with the thickness of more than 33mm is not reported, so that the matching capability and the overall competitiveness of China in the long-distance pipeline equipment manufacturing industry are severely restricted.
Patent publication No. CN102719614A proposes a process for producing acid-resistant pipeline steel by RH-LF-RH refining, the patent designs that the production flow is the RH-LF-RH refining process, which is different from the LF-RH refining production process of the patent, and the maximum thickness of a steel plate in the patent is only 22.2mm, but the thickness range of the patent is not large; and the patent does not mention the technique of intermediate cooling. Similar situations exist in patent publication No. CN102719728A (a process for producing acid-resistant pipeline steel by RH-LF-VD refining) and in patent publication No. CN102676744A (a process for producing acid-resistant pipeline steel by VD-LF-VD refining);
patent publication No. CN108624811A proposes a large-thick-wall acid-resistant corrosion-resistant pipeline steel and a production method thereof, the patent designs a production flow to be an RH-LF refining process, which is different from the LF-RH refining production process of the patent, and the design components are greatly different from the patent, the patent only mentions the HIC resistance, does not mention the drop hammer performance of the large-thick-wall acid-resistant corrosion-resistant pipeline steel, and the patent can meet that the average shear surface ratio of the drop hammer at-5 ℃ of the thickness X52MS of 35.1-44.2mm is more than or equal to 85 percent.
The invention provides a large-wall-thickness X52MS acid-resistant pipeline steel plate produced by an LF-RH refining process and a manufacturing method thereof, which adopt low-carbon low-manganese microalloy element design, and the combination of controlled rolling and controlled cooling and a specific intermediate billet cooling technology, and can meet the requirement of large-wall-thickness X52MS acid-resistant pipeline steel used under the low-temperature acidic condition of-5 ℃.
Disclosure of Invention
The invention aims to solve the technical problem of providing an X52MS acid-resistant pipeline steel plate with large wall thickness produced by an LF-RH refining process and a manufacturing method thereof.
The technical scheme adopted by the invention for solving the problems is as follows: an X52MS acid-resistant pipeline steel plate with large wall thickness produced by an LF-RH refining process comprises the chemical components of 0.03-0.05 percent of C and 0.2-0.4 percent of Si in percentage by weight; mn 1.0-1.4; 0.02-0.04 of Al; nb 0.02-0.05; v is less than or equal to 0.02; ti 0.004-0.012; 0.1-0.4 of Cr; mo 0.1-0.2; b is less than or equal to 0.0005; p is less than or equal to 0.012; s is less than or equal to 0.001; [ N ] is less than or equal to 0.005; [ O ] is less than or equal to 0.005; [H] less than or equal to 0.0015; the cold crack sensitivity coefficient (Pcm) is less than or equal to 0.19, and the balance is Fe and inevitable impurities.
The invention adopts the micro-alloy component design with low carbon and low manganese content and Nb and Ti as the main components, adds a small amount of Cr, Mo and other alloys, and simultaneously strictly controls the content of P, S, [ O ], [ N ], [ H ] and other impurity elements and the center segregation of a continuous casting billet, and fully exerts the fine regulation and control of rolling control and cooling control on the structure. The steel plate comprises the following specific production steps: KR molten iron pretreatment, converter, LF refining, RH vacuum degassing, slab casting, slow cooling, continuous casting billet heating, rough rolling, intermediate billet cooling, finish rolling, ACC cooling, performance detection, packaging and warehousing.
The reasons for selecting the functions and contents of the components in the invention are specifically described as follows:
c: carbon is the most main element for improving the strength and the cheapest element, the strength of the steel is increased along with the increase of the carbon content, but the carbon brings adverse effects on the ductility, toughness and welding performance of the steel, the low-carbon steel is adopted in the invention, and the selection range of the C content is 0.03-0.07%.
Si: the deoxidizing element improves the strength of the steel in a solid solution strengthening mode, if the deoxidizing effect is influenced by too low, adverse effects are generated on the surface quality, the toughness and the welding performance by too high, and the Si content is selected within the range of 0.2-0.4% by comprehensive consideration.
Mn: the basic alloy elements of the low-alloy steel can make up for the strength loss caused by the over-low C; is one of the main alloy elements affecting strength, hardenability and weldability. However, Mn segregation is easily generated due to excessively high manganese content, particularly, a thick plate blank needs to be continuously cast when a thick steel plate is produced, segregation is easily formed in the center of the continuous casting blank due to excessively high Mn content, the acid resistance of the steel plate is reduced, and the selection range of the Mn content is 1.0-1.4% due to comprehensive consideration;
al: plays roles of deoxidation and nitrogen fixation, and plays a role of grain refinement through AlN formation. The selection range of the Al content is 0.02-0.04%.
Nb: in the controlled rolling process, the temperature range of an austenite recrystallization region can be increased, austenite grains are effectively refined, the effect of fine grain strengthening is achieved, and the improvement of strength and toughness is facilitated. In the process of quenching and tempering, the solid-dissolved Nb can form NbC which is precipitated in a dispersion strengthening mode, the strength can be improved without damaging the toughness, and the selection range of the Nb content is 0.02-0.05 percent in comprehensive consideration.
Ti: the formation of TiN effectively refines the crystal grains by precipitation strengthening, but excessive Ti content causes coarsening of titanium nitride, which adversely affects low-temperature toughness. The selection range of the Ti content of the invention is 0.004-0.012%.
Cr: the main element for improving the hardenability can well make up the defect of strength and hardenability reduction caused by lower C content. When the content is too high, the low-temperature impact toughness and weldability are adversely affected. The Cr content of the invention is selected within the range of 0.1-0.4%.
Mo: the addition of a proper amount of Mo can improve the hardenability of the material and delay the ferrite transformation, and is an important alloy element for controlling the phase change process; the content of Mo in the invention is selected from 0.1-0.2%.
P, S, [ O ], [ N ], [ H ]: as a main impurity element in steel, the low-temperature toughness of the steel sheet is adversely affected, and particularly the low-temperature toughness of the core portion is better controlled as the alloy content is lower. According to the actual production conditions, the selection ranges of the P, S, [ O ], [ N ] and [ H ] contents are that P is less than or equal to 0.012%, S is less than or equal to 0.001%, N is less than or equal to 0.005, O is less than or equal to 0.005, and H is less than or equal to 0.0015.
An acid-resistant pipeline steel plate with large wall thickness X52MS produced by an LF-RH refining process and a manufacturing method thereof comprise the following process steps:
(1) in the steelmaking process, KR molten iron pretreatment, converter smelting, LF refining and RH vacuum degassing treatment are adopted to produce high-purity molten steel, then a continuous casting slab with the thickness of 300-450mm is produced through an extra-thick continuous casting slab production process, the low-power center segregation of the continuous casting slab reaches C0.5 level at the lowest, then the continuous casting slab is subjected to covering, stacking, slow cooling and hydrogen expansion treatment, and the stacking slow cooling time is not less than 72 hours.
(2) Heating the continuous casting slab to 1150-1230 ℃, preserving heat for 180-fold for 210min at the soaking section, fully dissolving alloy elements in the steel to ensure the uniformity of the performance, and descaling the continuous casting slab by using high-pressure water after the continuous casting slab is discharged from the furnace.
(3) Carrying out two-stage rolling, wherein the first stage is recrystallization zone rough rolling, the initial rolling temperature is 1000-1100 ℃, and the average reduction rate of the last three single-pass is more than or equal to 22 percent; after the rough rolling is finished, the intermediate blank enters a cooling system to perform intermediate cooling on the blank to be subjected to temperature control, so that the blank rapidly reaches the finish rolling initial temperature, and the air cooling time is longer due to the fact that the continuous casting blank is thick; the second stage is finish rolling in a non-recrystallization region, wherein the initial rolling temperature is 790 plus 830 ℃, the final rolling temperature is 770 plus 810 ℃, and the accumulated pass reduction rate is more than or equal to 60 percent; after finish rolling, the metallographic structure of the steel plate is polygonal ferrite and a small amount of pearlite, the grain size is less than or equal to grade 8, and the steel plate is subjected to hot straightening after rolling.
(4) And (3) after rolling, the steel plate enters ACC cooling equipment for cooling, and the cooling speed is 10-20 ℃/s. The final cooling temperature is controlled at 440-520 ℃.
Compared with the prior art, the invention has the advantages that:
1) the invention adopts low-carbon low-manganese Nb and Ti as main materials, and adds a small amount of Cr, Mo and other alloys, and strictly controls the content of P, S, [ O ], [ N ], [ H ] and other impurity elements and the center segregation of the continuous casting billet, thereby producing high-purity high-quality billets.
2) By adopting a specific rolling process, low-speed high reduction is adopted in the rough rolling stage, particularly in the last three passes (the secondary compression ratio of the last three passes is more than or equal to 22%), deformation can be ensured to fully permeate into the core part of the steel plate, and the deformation uniformity in the thickness direction of the steel plate is improved. The accumulated pass reduction rate in the finish rolling stage is more than or equal to 60 percent so as to ensure that the hardened austenite grains are fully flattened and elongated.
3) And an intermediate billet cooling system is adopted to perform intermediate cooling on the blank to be heated, and the blank after rough rolling is cooled to a temperature close to the finish rolling starting temperature, so that the time for the intermediate blank to stand is shortened, the production rhythm is improved, and the austenite grains are effectively inhibited from growing after the intermediate blank is cooled.
4) The steel plate produced according to the invention has good low-temperature toughness and corrosion resistance on the basis of meeting the strength, the yield strength is 380-440MPa, the tensile strength is 490-570MPa, the elongation is more than or equal to 33 percent, and the yield ratio is less than or equal to 0.90; the average shear surface ratio of the drop hammer at the temperature of minus 5 ℃ is more than or equal to 85 percent; can meet the requirement of the steel for the large-wall-thickness X52MS pipeline used in the acid environment.
Drawings
FIG. 1 is a photograph of the microstructure at the center of a 35.1mm thick steel plate according to the present invention.
FIG. 2 is a photograph of the microstructure at the center of a 38.3mm thick steel plate according to the present invention.
FIG. 3 is a photograph of the microstructure at the center of a 44.2mm thick steel plate according to the present invention.
FIG. 4 is a photograph of the detection surface of three HIC samples of example 1 of the present invention.
FIG. 5 is a photograph of the detection surface of three HIC samples of example 2 of the present invention.
FIG. 6 is a photograph of the detection surface of three HIC samples of example 3 of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Examples 1 to 3:
according to the chemical composition range and the manufacturing method of the invention, steel plates used under acidic conditions with the thicknesses of 35.1mm (example 1), 38.3mm (example 2) and 44.2mm (example 3) are manufactured through the process steps of KR molten iron pretreatment, converter smelting, LF refining, RH vacuum degassing, continuous casting, covering and slow cooling of continuous casting billets, billet checking and cleaning, billet heating, high-pressure water descaling, rough rolling, intermediate billet cooling, finish rolling, ACC cooling and the like.
The specific process of the heating, rolling and cooling stages comprises the following steps: heating a continuous casting slab with the thickness of 370mm to 1180 ℃, keeping the temperature for 180min (examples 1 and 2) or heating the continuous casting slab with the thickness of 450mm to 1200 ℃, keeping the temperature for 210min (example 3), and descaling the continuous casting slab by using high-pressure water after the continuous casting slab is discharged; two-stage rolling was then carried out, the first stage starting at 1060 ℃ (examples 1 and 2) or 1050 ℃ (example 3), the intermediate thickness of 145mm (example 1), 142mm (example 2) and 158mm (example 3), and the average reduction of the last three single passes of 25% (example 1), 23% (example 2) and 22% (example 3); the second-stage rolling temperature was 820 ℃, the cumulative pass reduction was 76% (example 1) or 815 ℃, the cumulative pass reduction was 73% (example 2) or 810 ℃, the cumulative pass reduction was 72% (example 3), and the final sheet thicknesses were 35.1mm (example 1), 38.3mm (example 2) and 44.2mm (example 3). After rolling, accelerated ACC cooling was carried out at a cooling rate of 19 ℃/S (example 1) or 21 ℃/S (example 2) or 23 ℃/S (example 3), and the final cooling temperature was controlled at 500 ℃ (example 1) or 490 ℃ (example 2) or 480 ℃ (example 3).
The chemical compositions of the steel sheets obtained in examples 1, 2 and 3 are shown in table 1, the mechanical properties of the steel sheets are shown in table 2, and the results of HIC test for the steel sheets are shown in fig. 4, 5 and 6.
Table 1 chemical composition (wt.%) of steel sheets of examples 1, 2 and 3
| Examples of the invention | C | Si | Mn | Al | Nb+Ti | Cr+Mo | P | S | [O] | [N] | [H] |
| 1 | 0.035 | 0.25 | 1.20 | 0.03 | 0.042 | ≤0.5 | 0.008 | 0.0004 | 0.0010 | 0.0019 | 0.0001 |
| 2 | 0.04 | 0.24 | 1.22 | 0.03 | 0.039 | ≤0.5 | 0.009 | 0.0005 | 0.0009 | 0.0021 | 0.0001 |
| 3 | 0.04 | 0.25 | 1.20 | 0.03 | 0.041 | ≤0.5 | 0.008 | 0.0005 | 0.0010 | 0.0023 | 0.0001 |
Table 2 mechanical properties of steel sheets of examples 1, 2 and 3
TABLE 3 HIC RESISTANCE OF X52MS STEEL SHEETS IN EXAMPLES 1, 2 AND 3
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (2)
1. A preparation method of a large-wall-thickness X52MS acid-resistant pipeline steel plate produced by an LF-RH refining process is characterized by comprising the following steps: the steel plate comprises the chemical components of 0.03-0.05 wt% of C and 0.2-0.4 wt% of Si; mn 1.0-1.4; 0.02-0.04 of Al; nb 0.02-0.05, V less than or equal to 0.02; ti 0.004-0.012, Cr 0.1-0.4; mo 0.1-0.2; b is less than or equal to 0.0005; p is less than or equal to 0.012; s is less than or equal to 0.001; [ N ] is less than or equal to 0.005; [ O ] is less than or equal to 0.005; [H] less than or equal to 0.0015; the cold crack sensitivity coefficient Pcm is less than or equal to 0.19, and the balance is Fe and inevitable impurities;
the method comprises the following steps:
firstly, smelting raw materials are sequentially subjected to KR molten iron desulphurization pretreatment, converter top and bottom blowing, LF refining, RH refining and continuous casting process treatment to form a high-purity continuous casting billet with the thickness of 300-450mm, the lowest center segregation of the continuous casting billet reaches C0.5 level, and after the continuous casting is finished, covering and slow cooling are carried out on the continuous casting billet for more than or equal to 72 hours;
secondly, heating the continuous casting slab to 1150-1230 ℃, preserving heat for 180 times in a soaking section for 210min, and descaling the continuous casting slab by using high-pressure water after the continuous casting slab is discharged from the furnace;
thirdly, carrying out rough rolling, wherein the rough rolling is rolling in a recrystallization zone at the beginning of 1000-1100 ℃, and the average reduction rate of the last three single passes is more than or equal to 22 percent;
fourthly, the intermediate blank cooling system performs intermediate cooling on the blank to be heated, and cools the blank after rough rolling to the temperature close to the finish rolling starting temperature;
finish rolling is carried out, the rolling in the non-recrystallization region is carried out in the stage, the initial rolling temperature is 790-830 ℃, the final rolling temperature is 770-810 ℃, and the accumulated pass reduction rate is more than or equal to 60 percent; hot straightening after rolling;
sixthly, the steel plate is cooled in ACC cooling equipment after being rolled, the cooling speed is 10-20 ℃/s, and the final cooling temperature is controlled at 440-520 ℃;
and seventhly, flaw detection and finishing are carried out on the steel plate to obtain a finished steel plate.
2. The method for preparing the acid-resistant pipeline steel plate with the large wall thickness of X52MS produced by the LF-RH refining process according to claim 1, wherein the method comprises the following steps: the thickness of the steel plate is 35.1-44.2mm, the yield strength is 380-440MPa, the tensile strength is 490-570MPa, the elongation is more than or equal to 33 percent, and the yield ratio is less than or equal to 0.90; the average shear surface ratio of the drop hammer at the temperature of minus 5 ℃ is more than or equal to 85 percent; can meet the use requirement in low-temperature acid environment.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099522A (en) * | 2014-07-16 | 2014-10-15 | 首钢总公司 | Non-copper and nickel acid resistant pipeline steel X52MS and production method of hot-rolled plate coil thereof |
| RU2548536C1 (en) * | 2013-12-06 | 2015-04-20 | Акционерное общество "Выксунский металлургический завод" (АО "ВМЗ") | Production method of thick rolled plates of strength classes k52-k60, x52-x70, l360-l485 to manufacture electric welded pipes of main pipelines |
| CN107502821A (en) * | 2017-08-29 | 2017-12-22 | 江阴兴澄特种钢铁有限公司 | The economical X 70 pipeline steel plate and its manufacture method used under a kind of special think gauge ultra-low temperature surroundings |
| CN107604249A (en) * | 2017-08-11 | 2018-01-19 | 江阴兴澄特种钢铁有限公司 | A kind of economical hic resistance and anti-SSCCX80MS pipe line steels and its manufacture method |
| CN107937802A (en) * | 2017-10-26 | 2018-04-20 | 江阴兴澄特种钢铁有限公司 | 60 80mm thickness low-crackle sensitives, easy weld-end fittings steel plate and its manufacture method used under a kind of cryogenic conditions |
| CN109161790A (en) * | 2018-08-22 | 2019-01-08 | 江阴兴澄特种钢铁有限公司 | The high-level high tenacity pipe fitting steel plate and its manufacturing method used under a kind of acid condition |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014024234A1 (en) * | 2012-08-10 | 2014-02-13 | Nippon Steel & Sumitomo Metal Corporation | Steel plate for high strength steel pipe and high strength steel pipe |
| JP6384679B2 (en) * | 2016-01-27 | 2018-09-05 | Ｊｆｅスチール株式会社 | Manufacturing method of hot-rolled steel sheet |
| CN109594015A (en) * | 2018-11-21 | 2019-04-09 | 包头钢铁（集团）有限责任公司 | A kind of low cost acid-resisting corrosion X70MS pipe line steel and preparation method thereof |
| CN109881095B (en) * | 2019-03-14 | 2020-12-18 | 南京钢铁股份有限公司 | grade-B acid-resistant pipeline steel plate and smelting process |
-
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2548536C1 (en) * | 2013-12-06 | 2015-04-20 | Акционерное общество "Выксунский металлургический завод" (АО "ВМЗ") | Production method of thick rolled plates of strength classes k52-k60, x52-x70, l360-l485 to manufacture electric welded pipes of main pipelines |
| CN104099522A (en) * | 2014-07-16 | 2014-10-15 | 首钢总公司 | Non-copper and nickel acid resistant pipeline steel X52MS and production method of hot-rolled plate coil thereof |
| CN107604249A (en) * | 2017-08-11 | 2018-01-19 | 江阴兴澄特种钢铁有限公司 | A kind of economical hic resistance and anti-SSCCX80MS pipe line steels and its manufacture method |
| CN107502821A (en) * | 2017-08-29 | 2017-12-22 | 江阴兴澄特种钢铁有限公司 | The economical X 70 pipeline steel plate and its manufacture method used under a kind of special think gauge ultra-low temperature surroundings |
| CN107937802A (en) * | 2017-10-26 | 2018-04-20 | 江阴兴澄特种钢铁有限公司 | 60 80mm thickness low-crackle sensitives, easy weld-end fittings steel plate and its manufacture method used under a kind of cryogenic conditions |
| CN109161790A (en) * | 2018-08-22 | 2019-01-08 | 江阴兴澄特种钢铁有限公司 | The high-level high tenacity pipe fitting steel plate and its manufacturing method used under a kind of acid condition |
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